he used his handcuffs to choke the deputy. shortly after the escape, champagne stopped at his house nearby. >>> it was one of the most infamous cases of witness intimidation in the country. the man who pulled the trigger will begin severing his sentence. >> reporter: this is what karl lackle's family has been waiting for since he was murdered in 2007. now everyone in the case has been sentenced, including the teenaged shooter. >> reporter: a federal judge sentences the trigger man friday. 18-year-old jonathan cornish was the last to receive his fate. 40 years in prison. >> he'll never live a life. he'll just exist. and maybe that's what he deserves. uh, but it's still tragic. >> my nephew 's a good kid. he meant well. >> reporter: he truly apologies for taking the young father. >> he looked at the picture of my son and it made me feel better. >> reporter: the judge called the killing blatant and cold-blooded. he testified against the mastermind of the murder. patrick byers orchestrated it all via cell phone from his prison cel